A placeholder (or cell) for the value of an Instance Variable with respect to either a Unit or Population.

A DimensionalData Point is uniquely identified by the combination of exactly one value for each of the dimensions (Identifier Component) and one measure (Measure Component). There may be multiple values for the same DimensionalData Point that is for the same combination of dimension values and the same measure. The different values represent different versions of the data in the Data Point. Values are only distinguished on the basis of quality, date/time of measurement or calculation, status, etc. This is handled through the mechanisms provided by the Datum information object.